package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.BaseException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;
import springfox.documentation.spring.web.json.Json;

import javax.annotation.Resource;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.stream.Collectors;

/**
 * @Author: lutongtong
 * @Date: 2024/09/26/18:33
 * @Description:
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Resource
    private OrderMapper orderMapper;

    @Resource
    private OrderDetailMapper orderDetailMapper;

    @Resource
    private AddressBookMapper addressBookMapper;

    @Resource
    private ShoppingCartMapper shoppingCartMapper;

    @Resource
    private WeChatPayUtil weChatPayUtil;

    @Resource
    private UserMapper userMapper;

    @Resource
    private WebSocketServer webSocketServer;

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    public OrderVO selectDdxq(Long id) {

        //根据传入的id查询订单
        Orders orders = orderMapper.getById(id);
        //查询订单中的套餐信息
        List<OrderDetail> list = orderDetailMapper.getByOrderId(orders.getId());
        //将订单信息放进创建的实体类中
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        //设置订单中的套餐信息
        orderVO.setOrderDetailList(list);
        return orderVO;
    }

    /**
     * 用户提交订单
     * @param ordersSubmitDTO
     * @return
     */
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //1.校验是否存在业务异常(地址簿为空，购物车为空)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
            //地址簿为空
            if (addressBook == null ){
                //抛出自定义异常类
                throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
            }

            //查询当前用户的购物车数据 根据用户id
            Long userId = BaseContext.getCurrentId();
            ShoppingCart shoppingCart = new ShoppingCart();
            shoppingCart.setUserId(userId);
            List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
            //购物车为空
        if (shoppingCartList == null || shoppingCartList.size() == 0){
            //抛出自定义异常类
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //2.向订单表中插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setAddress(addressBook.getDetail());
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        orderMapper.insert(orders);


        //3.向订单明细表中插入一条或多条数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }


        //4.删除购物车中的数据
        shoppingCartMapper.deleteByUserId(orders.getUserId());

        //5.封装VO对象
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(LocalDateTime.now())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //支付成功订单进行来单提醒弹窗
        Map map = new HashMap<>();
        map.put("type",1);//1表示来单提醒  2表示催单
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号: " + outTradeNo);
        //需要返回为json格式
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }

    /**
     * 查询历史订单
     * @return
     */
    public PageResult selectOrder(int pageNum, int pageSize, Integer status) {
        //分页
        PageHelper.startPage(pageNum,pageSize);

        //查询条件实体类
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        //设置当前用户id
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        //设置当前订单状态
        ordersPageQueryDTO.setStatus(status);

        Page<Orders> page = orderMapper.selectOrder(ordersPageQueryDTO);

        List<OrderVO> list =new ArrayList<>();

        //查询订单明细，并将查询结果封装入OrderVO
        if (page != null && page.getTotal() > 0){
            for (Orders orders : page) {
                //订单id
                Long orderId = orders.getId();
                //根据订单id查询订单明细
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(),list);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    public OrderVO selectDetail(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);
        //根据订单id查询订单套餐
        Long ordersId = orders.getId();
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(ordersId);

        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     * @return
     */
    public void cancelOrderById(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     * @return
     */
    public void againOrder(Long id) {
        //查询当前用户id
        Long userId = BaseContext.getCurrentId();
        //根据订单id查询当前订单详情
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);
        //将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetails.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            //将原本订单中的菜品信息复制到购物车对象中
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
        //将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }


    /**
     * 各个状态的订单数量统计
     * @return
     */
    public OrderStatisticsVO getOrderCount() {

        Integer confirmed = orderMapper.countNumber(Orders.CONFIRMED);
        Integer delivery  = orderMapper.countNumber(Orders.DELIVERY_IN_PROGRESS);
        Integer toConfirmed= orderMapper.countNumber(Orders.TO_BE_CONFIRMED);

        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(delivery);
        orderStatisticsVO.setToBeConfirmed(toConfirmed);

        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     * @return
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     * @return
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        Long id = ordersRejectionDTO.getId();
        //根据id查询订单
        Orders ordersJJ = orderMapper.getById(id);
        //只有订单状态为待接单（状态为2）的订单才可以拒单
        if (ordersJJ==null || ordersJJ.getStatus().equals(Orders.REFUND)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //查询支付状态
        Integer payStatus = ordersJJ.getPayStatus();
        if (payStatus==Orders.PAID){
            //用户已支付需要退款
            String refund = weChatPayUtil.refund(
                    ordersJJ.getNumber(),
                    ordersJJ.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }
        //拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersJJ.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersRejectionDTO.getRejectionReason());
        orders.setOrderTime(LocalDateTime.now());
        //更新修改后的订单
        orderMapper.update(orders);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     * @return
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        //获取订单id
        Long id = ordersCancelDTO.getId();
        //根据id查询订单
        Orders orders = orderMapper.getById(id);
        //判断订单状态，只有状态为3的订单可以取消
        if (orders==null || orders.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //查询订单支付状态
        Integer payStatus = orders.getPayStatus();
        if (payStatus.equals(Orders.PAID)){
            //用户已支付需要退款
            String refund = weChatPayUtil.refund(
                    orders.getNumber(),
                    orders.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01)
            );
            log.info("申请退款：{}" ,refund);
        }
        //取消订单需要退款并更新退款时间，原因，状态
        Orders ordersNew = new Orders();
        ordersNew.setStatus(Orders.CANCELLED);
        ordersNew.setOrderTime(LocalDateTime.now());
        ordersNew.setCancelReason(ordersCancelDTO.getCancelReason());
        //更新订单
        orderMapper.update(ordersNew);
    }

    /**
     * 派送订单
     * @param id
     * @return
     */
    public void delivery(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);
        //判断订单是否为空且状态为3
        if (orders == null || orders.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //获取订单
        Orders ordersNew = new Orders();
        ordersNew.setId(orders.getId());
        ordersNew.setStatus(Orders.DELIVERY_IN_PROGRESS);
        ordersNew.setDeliveryTime(LocalDateTime.now());
        //更新订单状态
        orderMapper.update(ordersNew);
    }

    /**
     * 完成订单
     * @param id
     * @return
     */
    public void complete(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders == null || !orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders ordersNew = new Orders();
        ordersNew.setId(orders.getId());
        ordersNew.setStatus(Orders.COMPLETED);
        ordersNew.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(ordersNew);
    }

    /**
     * 用户催单
     * @param id
     * @return
     */
    public void reminder(Long id) {
        //根据订单号查询订单
        Orders orders = orderMapper.getById(id);
        //判断订单号是否存在
        if (orders != null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //将订单信息以json的格式返回给前端
        Map map = new HashMap<>();
        map.put("type",2);//1表示来单提醒 2表示用户催单
        map.put("orderId",orders.getId());
        map.put("content",id);
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }

}
